CN212244469U - Dehumidification bag - Google Patents
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- CN212244469U CN212244469U CN202020998013.3U CN202020998013U CN212244469U CN 212244469 U CN212244469 U CN 212244469U CN 202020998013 U CN202020998013 U CN 202020998013U CN 212244469 U CN212244469 U CN 212244469U
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Abstract
The utility model provides a dehumidification bag, the dehumidification bag includes: the bag body comprises a first side sheet and a second side sheet, wherein the side sheets comprise breathable films and/or composite films, and all or part of at least one side sheet is breathable film; and the moisture-proof layer covers the outer side of the breathable film. The dehumidification bag provided by the utility model has the advantages that the breathable film is arranged on the bag body, and the outer surface of the breathable film is sealed with the damp-proof layer, so that the breathable film is in close contact with the damp-proof layer and does not absorb moisture, and the dehumidification bag effectively prevents the dehumidification agent from deteriorating or losing efficacy due to the fact that the breathable film is in air contact with the outer bag in the transportation and storage processes; through setting the dampproof course to tearable, when the buyer used, only need tear the dampproof course and just can use, convenient, swift.
Description
Technical Field
The utility model relates to a dehumidification packing technical field, concretely relates to dehumidification bag and preparation method thereof.
Background
Every 6-7 months of the year is the plum rain season in the central and south regions of China, and due to abundant rainfall, strong ground evaporation capacity, high air humidity and high air temperature, the propagation and growth speed of the mold is obviously improved, so that clothes in the wardrobe are easy to mold, the taste is unpleasant, and the clothes also have mildew.
In order to prevent clothes from mildewing, people often place a dehumidifying agent in a wardrobe, the dehumidifying packaging in the current market is most widely applied to a composite packaging bag with a hook, the composite packaging bag generally comprises an outer bag, an inner bag body, a hook and a fixing clip, wherein the hook is positioned at the upper part of the fixing clip, the hook and the fixing clip are made of plastic, the fixing clip is used for clamping a drying agent containing opening of the bag body, the inner bag body is formed by combining an upper-layer drying agent bag (generally made of non-woven fabrics) and a lower-layer moisture absorption water bag into a whole through sealing, a plurality of permeation holes are formed in the bottom of the upper-layer drying agent bag, the ventilation through holes are formed in two sides of the surface of the bag body, and the bag body is hung.
Although the dehumidification bag has a certain dehumidification effect, the upper layer desiccant bag made of non-woven fabrics only has one protective layer in the storage process after the dehumidification agent is filled in the inner bag and the outer bag which are of a double-layer structure, the non-woven fabrics have air permeability, and after the dehumidification agent is filled in the inner bag and the outer bag, the desiccant can absorb moisture in air in the outer bag through the air permeable non-woven fabrics, so that the effect of the dehumidification agent is poor or ineffective.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming the dehumidification bag that is equipped with the desiccant among the prior art and absorbing the moisture in the bag air in storage and transportation, can lead to the effect variation or the defect that became invalid of desiccant to provide a dehumidification bag and preparation method thereof.
Therefore, the utility model provides a following technical scheme:
a desiccant bag comprising:
the bag body comprises a first side sheet and a second side sheet, wherein the side sheets comprise breathable films and/or composite films, and all or part of at least one side sheet is breathable film;
an accommodating cavity formed by heat-sealing the first side sheet and the second side sheet;
and the moisture-proof layer covers the outer side of the breathable film. The moisture barrier is tearable.
Further, the bag body also comprises a bottom plate which is heat-sealed together with the first side plate and the second side plate to form an accommodating cavity. When the desiccant bag comprises a backsheet, it may be realized as a stand-up, also called a desiccant stand-up bag.
Further, the bag body is provided with a sealing structure capable of being opened and closed. The openable sealing structure can be a zipper or a sealing strip.
Further, the moisture barrier includes a reinforcing layer and a barrier layer.
Further, the barrier layer is a polyethylene terephthalate film layer;
the enhancement layer is an aluminum foil layer, a polyester aluminum-plated film layer or a film layer formed by aluminum foil and polyethylene glycol terephthalate;
the breathable film is non-woven fabric or Tyvek.
One side or two sides of the barrier layer can be provided with a pattern layer; the pattern layer can display some words related to the product or the description of the pattern, which is convenient for the consumer to understand.
Further, the thickness of the barrier layer is 12-50 μm.
The composite film may be a conventional composite film such as a polyethylene film or the like. Furthermore, the composite film sequentially comprises a heat sealing layer, a bonding layer, an ink layer and a printing layer from inside to outside.
Further, the heat sealing layer is a polyethylene layer or a casting polypropylene layer;
the printing layer is a polyethylene terephthalate film layer and/or a polyamide layer.
Further, the thickness of the adhesive layer is 1-3 μm;
the thickness of the ink layer is less than 3 μm;
the thickness of the heat sealing layer is 30-150 μm;
the thickness of the printing layer is 12-50 μm.
Furthermore, an easy-to-pull structure is arranged on the moisture-proof layer. The pop-top structure extends out of the heat-sealing end and can be square, rectangular, circular arc, oval and the like.
The utility model also provides a preparation method of dehumidification bag, including following step:
the moisture-proof layer, the first side piece and the second side piece are subjected to heat sealing to obtain the dehumidifying bag, wherein the side pieces are made of breathable films and/or composite films, and all or part of at least one side piece is a breathable film; the moisture-proof layer is positioned on the outer side of the breathable film.
When all of a lateral plate are breathable films, the lateral plate which is the breathable film is arranged between the lateral plate of the composite film and the moisture-proof layer, then the moisture-proof bag is obtained by heat sealing, and the moisture-proof bag forms a containing cavity which is used for containing a desiccant between the breathable film and the composite film.
When two lateral plates are all breathable films, the two breathable films are arranged between the two moisture-proof layers and then are subjected to heat sealing, so that the dehumidifying bag is obtained, and a containing cavity for containing a dehumidifying agent is formed between the two breathable films.
When the part of one side sheet is a breathable film, the breathable film is overlapped with the composite film to form a composite side sheet (namely the side sheet consisting of the breathable film and the composite film), and the breathable film at the overlapped part is positioned at the inner side of the composite film; then heat-seal it with another lateral plate and dampproof course, get the dehumidification bag, during the heat-seal, the dampproof course is located the one side of keeping away from another lateral plate on the ventilated membrane, and this dehumidification bag forms the chamber that holds that is used for holding the desiccant between compound lateral plate and the lateral plate that is the complex film entirely.
When the parts of the two side pieces are breathable films, the breathable films are overlapped with the composite film to form a composite side piece (namely the side piece consisting of the breathable films and the composite film), and the breathable films at the overlapped part are positioned at the inner side of the composite film; then the two composite side plates and the moisture-proof layer are subjected to heat sealing, and the moisture-proof layer is positioned on one side of the breathable film far away from the other composite side plate; namely, the dehumidifying bag forms a containing cavity for containing dehumidifying agent between the two composite side pieces.
Further, when heat sealing is performed, transverse heat sealing is performed first, and then longitudinal heat sealing is performed to form two side heat seal edges.
Further, the dehumidifying bag further comprises a bottom plate, and the moisture-proof layer, the bottom plate, the first side plate and the second side plate are subjected to heat sealing to obtain the dehumidifying bag. The bottom sheet may be of any shape capable of supporting the pouch body free-standing, such as oval, circular, etc.
Further, the heat sealing temperature is 130-220 ℃, and the time is 0.5-1 s.
Further, before heat sealing, the method also comprises the step of coating heat-sealing glue on the moisture-proof layer; wherein the speed of coating the heat-sealing glue is less than or equal to 200 m/min;
when heat-sealing glue is coated, the drying temperature of the first-section drying channel is 70-90 ℃, the drying temperature of the second-section drying channel is 80-120 ℃, and the drying temperature of the third-section drying channel is 90-150 ℃;
the coating weight of the dried heat sealing adhesive is 3-6g/m2。
Furthermore, the moisture-proof layer is sequentially provided with an enhancement layer and a barrier layer from inside to outside; the composite film sequentially comprises a heat sealing layer, a bonding layer, an ink layer and a printing layer from inside to outside;
the method also comprises a step of printing ink patterns on the barrier layer and/or the printing layer, wherein the printing speed is 100-300m/min, and the drying temperature is 40-80 ℃.
Further, the preparation step of the moisture-proof layer is that the barrier layer printed with the ink patterns and the reinforcing layer are compounded and cured to obtain the moisture-proof layer;
the preparation method of the composite layer comprises the steps of compounding and curing the printing layer, the bonding layer and the heat sealing layer to obtain the composite layer.
Further, the compounding speed is less than or equal to 200 m/min;
during compounding, the temperature for first-stage drying is 50-60 ℃, the temperature for second-stage drying is 65-85 ℃, the temperature for third-stage drying is 75-90 ℃, and the bonding temperature is 50-70 ℃; after the compounding is finished, curing at 40-50 ℃ for more than or equal to 48 h.
The utility model discloses technical scheme has following advantage:
1. the utility model provides a dehumidification bag, include: the bag body comprises a first side sheet and a second side sheet, wherein the side sheets comprise breathable films and/or composite films, and all or part of at least one side sheet is breathable film; and the moisture-proof layer covers the outer side of the breathable film. The dehumidification bag provided by the utility model has the advantages that the breathable film is arranged on the bag body, and the outer surface of the breathable film is covered by the moisture-proof layer and is sealed by heat, so that the breathable film is in close contact with the moisture-proof layer and does not absorb moisture, and the dehumidification bag effectively prevents the dehumidification agent effect from being poor or losing efficacy due to the fact that the breathable film is in air contact with the outer bag in the transportation and storage processes; and this dampproof course is tearable, when the purchaser used, only need tear the dampproof course and just can use, and is convenient, swift. In addition, because the moisture is heavier than the air and moves downwards, the bottom of the wardrobe or the cupboard is a moisture gathering point, and the existing dehumidifying bag is hung on a clothes hanging rod in the wardrobe through a hook, namely above the wardrobe, so that the dehumidifying effect is poor; the utility model provides a dehumidification bag can be placed in the bottom of wardrobe or cupboard, need not the couple, and dehumidification is effectual.
2. The utility model provides a dehumidification bag through setting up the film, can realize the self-reliance. The bottom sheet can be any shape of horizontal support structure of the bottom of the existing stand-up pouch, so that the pouch can stand by itself without any support.
3. The utility model provides a dehumidification bag through setting up the seal structure that can open and shut, treats the dehumidification agent inefficacy back in the dehumidification bag, and the purchaser can open the dehumidification agent of renewal by oneself, then with closed self sealss structure, continues to use, reaches reuse's effect, practices thrift cost and energy.
4. The utility model provides a dehumidification bag, which is characterized in that the ventilated membrane is defined as non-woven fabric or Tyvek; the non-woven fabric or the Tyvek fabric has good air permeability but does not leak water, can allow water vapor in the air to permeate through, and then allows a dehumidifying agent in the bag to adsorb to achieve the aim of dehumidification, and even if the dehumidifying bag is poured, the water in the bag cannot flow out due to the impermeable air film; including a barrier layer and a reinforcement layer by defining the moisture barrier; the barrier layer is a polyethylene glycol terephthalate film layer, the enhancement layer is an aluminum foil layer, a polyester aluminum-plated film layer or a film layer formed by aluminum foil and polyethylene glycol terephthalate; so that the heat-seal strength of the moisture-proof layer and the air-permeable and water-impermeable layer can be kept between 5 and 20N/15 mm; the moisture-proof layer is good in contact with the breathable film, easy to tear and convenient to use.
5. The utility model provides a dehumidification bag, through the thickness of injecing the barrier layer, can improve the dampproofing effect of transportation or in the storage process, also improve the leakproofness effect on dampproof course and ventilative layer promptly.
6. The utility model provides a dehumidification bag, through the thickness of injecing the layer structure of complex film and every layer, can further improve the leakproofness effect on dampproof course and ventilative layer.
7. The utility model provides a dehumidification bag, through stretch out heat-seal department on the dampproof course and set up the structure that easily tears the dampproof course, more make things convenient for tearing of buyer to the dampproof course.
8. The utility model provides a preparation method of dehumidification bag, including following step: the moisture-proof layer, the first side piece and the second side piece are subjected to heat sealing to obtain the dehumidifying bag, wherein the side pieces are made of breathable films and/or composite films, and all or part of at least one side piece is a breathable film; the moisture-proof layer is positioned on the outer side of the breathable film.
The moisture-proof layer covers the outer side of the breathable film, so that the breathable film is tightly contacted with the moisture-proof layer in the prepared dehumidifying bag and does not absorb moisture, and the effect of the dehumidifying agent is effectively prevented from being deteriorated or losing efficacy due to the contact of the breathable film and the outside air in the transportation and storage processes; and the dampproof course is tearable, when the purchaser used, only need tear the dampproof course and just can use, convenient, swift. In addition, because the moisture is heavier than the air and moves downwards, the bottom of the wardrobe or the cupboard is a moisture gathering point, and the existing dehumidifying bag is hung on a clothes hanging rod in the wardrobe through a hook, namely above the wardrobe, so that the dehumidifying effect is poor; the dehumidification bag provided by the utility model can be placed at the bottom of a wardrobe or a cupboard, and has good dehumidification effect without a hook; moreover, the preparation method of the dehumidifying bag provided by the utility model is simple and convenient, and can save materials by heat sealing.
9. The utility model provides a preparation method of dehumidification bag through with dampproof course, film, first lateral plate and second lateral plate heat-seal, forms the bag body that has the chamber of holding, can realize the self-reliance.
10. The utility model provides a preparation method of dehumidification bag, through limiting the temperature and the time of heat-seal, prevent that the phenomenon of fold, small bubble or delaminating from appearing in the place of heat-seal after the heat-seal, can improve the sealed effect of dampproof course and ventilated membrane in the dehumidification bag that makes, the effect that can tear of balanced dampproof course simultaneously makes ventilated membrane and dampproof course in close contact with, and does not absorb moisture, prevent effectively in the transportation and the in-process of storing that the contact of ventilated membrane and outside air leads to the dehumidizer effect to worsen or become invalid; when the moisture-proof layer is used by a purchaser, the moisture-proof layer can be torn off, so that the moisture-proof layer is convenient and quick to use. In addition, because the moisture is heavier than the air and moves downwards, the bottom of the wardrobe or the cupboard is a moisture gathering point, and the existing dehumidifying bag is hung on a clothes hanging rod in the wardrobe through a hook, namely above the wardrobe, so that the dehumidifying effect is poor; the dehumidifying bag prepared by the method can be placed at the bottom of a wardrobe or a cupboard, a hook is not needed, and the dehumidifying effect is good.
11. The utility model provides a preparation method of dehumidification bag is injectd through the coating volume of speed and temperature and the stoving back heat-seal glue of gluing to the coating heat-seal glue, can improve the homogeneity of coating, further optimizes the leakproofness of dampproof course and ventilated membrane and can tear the performance.
12. The utility model provides a preparation method of dehumidification bag is injectd through the speed to the printing and the temperature of drying for printing picture and text chromatography is accurate, and printing ink is even, and the colour does not have obvious colour difference moreover.
13. The utility model provides a preparation method of dehumidification bag is injectd through the temperature and the time to compound speed, composite temperature, laminating temperature and compound postcure, can improve compound fastness and intensity to prevent that the solvent from remaining and exceeding standard and peculiar smell, the environmental protection is healthy.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a front view of a dehumidifying bag according to embodiment 1 of the present invention;
fig. 2 is a schematic structural view of a second side sheet according to embodiment 1 of the present invention;
fig. 3 is a rear view of the dehumidifying bag according to embodiment 1 of the present invention;
FIG. 4 is a cross-sectional view taken along the plane A-A in FIG. 1;
fig. 5 is a bottom view of the dehumidifying bag according to embodiment 1 of the present invention;
fig. 6 is a schematic perspective view of a dehumidifying bag according to embodiment 1 of the present invention;
fig. 7 is a schematic structural view of a moisture barrier in embodiment 1 of the present invention;
fig. 8 is a schematic structural view of a second composite film according to example 1 of the present invention;
fig. 9 is a front view of the dehumidifying bag according to embodiment 3 of the present invention.
Reference numerals:
1-a barrier layer; 2-an enhancement layer; 3-heat sealing layer; 4-an adhesive layer; 5-an ink layer; 6-printing layer; 7-a first side panel; 8-a gas permeable membrane; 9-a negative film; 10-a second side panel; 11-a second composite film; 12-a moisture barrier; 13-openable and closable slide fastener.
Detailed Description
The following examples are provided for better understanding of the present invention, and are not limited to the best mode, and do not limit the scope and content of the present invention, and any product that is the same or similar to the present invention, which is obtained by combining the features of the present invention with other prior art or the present invention, falls within the scope of the present invention.
The examples do not show the specific experimental steps or conditions, and can be performed according to the conventional experimental steps described in the literature in the field. The reagents or instruments used are not indicated by manufacturers, and are all conventional reagent products which can be obtained commercially.
Example 1
A dehumidifying bag, as shown in fig. 1-8, comprising:
the bag body comprises a first side sheet 7, a second side sheet 10 and a bottom sheet 9, wherein the first side sheet 7 is made of a first composite film, and the second side sheet 10 comprises a breathable film 8 and a second composite film 11; the bottom sheet 9 is composed of a third composite film; the first composite film, the second composite film 11 and the third composite film have the same structure and composition;
a containing cavity formed by heat sealing the first side sheet 7, the second side sheet 10 and the bottom sheet 9;
and the moisture-proof layer 12 covers one side of the breathable film 8 far away from the accommodating cavity.
The breathable film is arranged on the bag body, and the outer surface of the breathable film is sealed by the moisture-proof layer in a heat sealing mode, so that the breathable film is in close contact with the moisture-proof layer and does not absorb moisture, and the phenomenon that the effect of the desiccant is poor or the desiccant is invalid due to the fact that the breathable film is in contact with the outside air in the transportation and storage processes is effectively prevented; and the dampproof course is tearable, when the purchaser used, only need tear the dampproof course and just can use, convenient, swift. Through the arrangement of the bottom plate, the dehumidifying bag can stand by itself only through the bottom plate without any support. In addition, because the moisture is heavier than the air and moves downwards, the bottom of the wardrobe or the cupboard is a moisture gathering point, and the existing dehumidifying bag is hung on a clothes hanging rod in the wardrobe through a hook, namely above the wardrobe, so that the dehumidifying effect is poor; the utility model provides a dehumidification bag can be placed in the bottom of wardrobe or cupboard, need not the couple, and dehumidification is effectual.
As shown in fig. 7, the moisture barrier layer 12 includes a barrier layer 1 (in this embodiment, a polyethylene terephthalate film layer) and a reinforcing layer 2 (in this embodiment, an aluminum foil layer);
the breathable film 8 is a breathable and waterproof non-woven fabric, so that even if the dehumidification bag is poured, water in the dehumidification bag cannot flow out due to the breathable film;
as shown in fig. 8, the first composite film, the second composite film 11 and the third composite film are each composed of the following composite layers: the printing ink comprises a heat sealing layer 3 (a polyethylene layer is adopted in the embodiment), an adhesive layer 4, an ink layer 5 and a printing layer 6 (a polyethylene terephthalate film layer is adopted in the embodiment) from inside to outside in sequence;
through adopting foretell material to make the dampproof course not only good with the contact nature of ventilated membrane, easily tear moreover, convenient to use.
The thickness of the barrier layer 1 is 12-50 μm (30 μm is adopted in the embodiment); the sealing effect of the moisture-proof layer and the breathable film can be improved by limiting the thickness of the barrier layer.
The thickness of the adhesive layer 4 is 1-3 μm (3 μm is adopted in the embodiment);
the thickness of the ink layer 5 is less than 3 μm (2 μm is adopted in the embodiment);
the thickness of the heat sealing layer 3 is 30-150 μm (55 μm is adopted in the embodiment);
the thickness of the print layer 6 is 12-50 μm (30 μm is used in this embodiment).
The times of recycling the dehumidification bag can be improved and energy can be saved by limiting the layer structure of the composite film and the thickness of each layer.
The breathable film 8 and the second composite film 11 are heat-sealed together through lap joint;
as an alternative embodiment, the reinforcing layer 2 may also be a polyester aluminized film layer, or a film layer formed by aluminum foil and polyethylene terephthalate.
As another alternative, the breathable film 8 can be tyvek.
As yet another alternative, the heat-seal layer 3 may be a cast polypropylene layer.
As yet another alternative, the print substrate 6 may be a polyamide layer or a polyethylene terephthalate film layer and a polyamide layer.
The preparation method of the dehumidifying bag comprises the following steps:
preparing a composite membrane:
firstly, printing character patterns (namely the ink layer 5) on the inner side of the printing layer 6 by adopting a gravure printing machine, wherein the printing speed is 100m/min, and the drying temperature is 80 ℃;
then coating polyurethane adhesive (namely the adhesive layer 4) on one side of the printing layer 6 printed with the characters and patterns, wherein the speed of coating the polyurethane adhesive is 160 m/min;
then compounding the side of the printing layer 6 coated with the polyurethane adhesive with the heat sealing layer 3 at the compounding speed of 160 m/min; during compounding, the temperature of the first-section drying tunnel is 50 ℃, the temperature of the second-section drying tunnel is 65 ℃, the temperature of the third-section drying tunnel is 75 ℃, and the laminating temperature is 50 ℃;
after the compounding is finished, the composite film is cured in a curing chamber at the temperature of 45 ℃ for 48 hours to obtain the composite film.
Preparing a moisture-proof layer:
firstly, printing character patterns on the inner side of the barrier layer 1 by using a gravure printing machine, wherein the printing speed is 100m/min, and the drying temperature is 80 ℃;
then compounding the side of the blocking layer 1 printed with the character patterns with the enhancement layer 2 at the compounding speed of 160 m/min; during compounding, the temperature of the first-section drying tunnel is 50 ℃, the temperature of the second-section drying tunnel is 65 ℃, the temperature of the third-section drying tunnel is 75 ℃, and the laminating temperature is 50 ℃;
after the compounding is finished, the moisture-proof layer is cured in a curing chamber at the temperature of 45 ℃ for 48 hours to obtain the moisture-proof layer.
Coating:
coating heat-sealing glue on one side of the enhancement layer 2 of the moisture-proof layer 12; wherein the speed of coating the heat-sealing glue is 160 m/min; when heat-seal glue is coated, the drying temperature of the first-section drying tunnel is 70 ℃, the drying temperature of the second-section drying tunnel is 80 ℃, and the drying temperature of the third-section drying tunnel is 90 ℃; the coating weight of the dried heat seal adhesive is 3g/m2。
Slitting:
and respectively cutting the composite film 11, the coated moisture-proof layer 12 and the breathable film 8 according to the specification to obtain the coiled material with the required width: a first side sheet 7, a second composite film 11, a moisture barrier layer 12, a breathable film 8 and a bottom sheet 9.
And (3) heat sealing:
firstly, overlapping the cut breathable film 8 and a second composite film 11 to form a second side sheet 10, wherein the overlapped breathable film 8 is positioned at the inner side of the second composite film 11; then covering the breathable film 8 on one side of the moisture-proof layer 12 coated with the heat-sealing glue; the moisture-proof layer 12 at the lap joint part of the breathable film 8 and the second composite film 11 is positioned at the outer side of the second composite film 11, and then the lap joint part of the moisture-proof layer 12, the breathable film 8 and the second composite film 11 is subjected to transverse heat sealing, wherein the heat sealing temperature is 180 ℃ and the time is 0.5 s;
then, the bottom sheet 9 is transversely heat sealed with the first side sheet 7 and the second composite film 11 respectively; the heat sealing temperature is 150 ℃ and the time is 0.8 s;
finally, longitudinally heat-sealing the two side edges of the second side sheet 10, the first side sheet 7, the moisture-proof layer 12 and the bottom sheet 9 to form two side heat sealing edges, so as to obtain a bag body with an accommodating cavity, wherein the heat-sealing temperature is 220 ℃ and the time is 0.5 s; and the moisture-proof layer 12 is located on the side of the breathable film 8 remote from the first side sheet 7 when heat-sealed longitudinally. The bottom plate 9 is fixed between the first side plate 7 and the second side plate 10 to form the bottom of the dehumidification bag; a containing cavity for containing the dehumidifying agent is formed among the first side sheet 7, the second side sheet 10 and the bottom sheet 9;
and finally, cutting to obtain the dehumidifying bag.
After the moisture-proof agent is filled in the dehumidifying bag, the first side sheet 7 and the second side sheet 10 may be heat-sealed at the end away from the bottom sheet 9.
The heat-sealing strength of the moisture-proof layer and the breathable film of the prepared dehumidifying bag is tested, and the heat-sealing strength is 18N/15 mm.
Example 2
A dehumidifying bag, as shown in fig. 7, comprising:
a bag body including a first side sheet 7, a second side sheet 10, and a bottom sheet 9, the first side sheet 7 being formed of a first composite film; the bottom sheet 9 is composed of a third composite film, and the second side sheet 10 is a breathable film 8; the first composite film and the third composite film have the same structure and composition;
a containing cavity formed by heat sealing the first side sheet 7, the second side sheet 10 and the bottom sheet 9;
the dampproof course 12, cover in ventilated membrane 8 keeps away from hold one side in chamber, and dampproof course 12 stretches out heat-seal department and sets up the structure that easily tears the dampproof course, and this structure can be square, rectangle, arc, oval etc. (this embodiment adopts arc).
The breathable film is arranged on the bag body, and the outer surface of the breathable film is covered with the moisture-proof layer and is sealed in a heat-sealing mode, so that the breathable film is in close contact with the moisture-proof layer and does not absorb moisture, and the phenomenon that the effect of the dehumidifying agent is poor or fails due to the fact that the breathable film is in contact with the outside air in the transportation and storage processes is effectively prevented; through setting the dampproof course to tearable, when the buyer used, only need tear the dampproof course and just can use, convenient, swift. In addition, because the moisture is heavier than the air and moves downwards, the bottom of the wardrobe or the cupboard is a moisture gathering point, and the existing dehumidifying bag is hung on a clothes hanging rod in the wardrobe through a hook, namely above the wardrobe, so that the dehumidifying effect is poor; the utility model provides a dehumidification bag can be placed in the bottom of wardrobe or cupboard, need not the couple, and dehumidification is effectual.
The moisture-proof layer 12 comprises a barrier layer 1 (in this embodiment, a polyethylene terephthalate film layer is used) and a reinforcing layer 2 (in this embodiment, a polyester aluminized film layer is used);
the breathable film 8 is breathable and waterproof, so that water in the bag cannot flow out due to the breathable film even if the dehumidification bag is poured;
the first composite film and the third composite film are both composed of the following composite layers: the printing ink comprises a heat sealing layer 3 (a polyethylene layer is adopted in the embodiment), an adhesive layer 4, an ink layer 5 and a printing layer 6 (a polyethylene terephthalate film layer is adopted in the embodiment) from inside to outside in sequence;
make the in close contact with of dampproof course not only with the ventilated membrane through adopting foretell material, easily tear moreover, convenient to use.
The thickness of the barrier layer 1 is 12-50 μm (50 μm is adopted in the embodiment); the sealing effect of the moisture-proof layer and the breathable film can be improved by limiting the thickness of the barrier layer.
The thickness of the adhesive layer is 1-3 μm (2 μm is adopted in the embodiment);
the thickness of the ink layer is less than 3 μm (3 μm is adopted in the embodiment);
the thickness of the heat sealing layer 3 is 30-150 μm (150 μm is adopted in the embodiment);
the thickness of the printing layer 6 is 12-50 μm (12 μm is used in the present embodiment).
The times of recycling the dehumidification bag can be improved and energy can be saved by limiting the layer structure of the composite film and the thickness of each layer.
As an alternative embodiment, the reinforcing layer 2 may also be an aluminum foil layer, or a film layer formed by aluminum foil and polyethylene terephthalate.
As another alternative, the breathable film 8 may be a nonwoven fabric.
As yet another alternative, the heat-seal layer 3 may be a cast polypropylene layer.
As yet another alternative, the print substrate 6 may be a polyamide layer or a polyethylene terephthalate film layer and a polyamide layer.
The preparation method of the dehumidifying bag comprises the following steps:
preparing a composite membrane:
firstly, printing character patterns (namely the ink layer 5) on the inner side of the printing layer 6 by adopting a gravure printing machine, wherein the printing speed is 300m/min, and the drying temperature is 40 ℃;
then coating polyurethane adhesive (namely the adhesive layer 4) on one side of the printing layer 6 printed with the characters and patterns, wherein the speed of coating the polyurethane adhesive is 180 m/min;
then compounding the side of the printing layer 6 coated with the polyurethane adhesive with the heat sealing layer 3 at the compounding speed of 180 m/min; during compounding, the temperature of the first-section drying tunnel is 60 ℃, the temperature of the second-section drying tunnel is 85 ℃, the temperature of the third-section drying tunnel is 90 ℃, and the laminating temperature is 70 ℃;
after the compounding is finished, curing at 50 ℃ in a curing chamber for 60 hours; and obtaining the composite membrane.
Preparing a moisture-proof layer:
firstly, printing character patterns on the inner side of the barrier layer 1 by using a gravure printing machine, wherein the printing speed is 300m/min, and the drying temperature is 40 ℃;
compounding the side of the blocking layer 1 printed with the character patterns with the reinforcing layer 2 at the compounding speed of 180 m/min; during compounding, the temperature of the first-section drying tunnel is 60 ℃, the temperature of the second-section drying tunnel is 85 ℃, the temperature of the third-section drying tunnel is 90 ℃, and the laminating temperature is 70 ℃;
after the compounding is finished, curing at 50 ℃ in a curing chamber for 60 hours; and obtaining the moisture-proof layer.
Coating:
coating heat-sealing glue on one side of the enhancement layer 2 of the moisture-proof layer 12; wherein the coating isThe speed of the heat sealing glue is 200 m/min; when heat-seal glue is coated, the drying temperature of the first-section drying tunnel is 90 ℃, the drying temperature of the second-section drying tunnel is 120 ℃, and the drying temperature of the third-section drying tunnel is 150 ℃; the coating weight of the dried heat seal adhesive is 6g/m2。
Slitting:
and respectively cutting the composite film 11, the coated moisture-proof layer 12 and the breathable film 8 according to the specification to obtain the coiled material with the required width: a first side sheet 7, a second side sheet 10 (breathable film 8), a moisture barrier layer 12 and a backsheet 9.
And (3) heat sealing:
firstly, transversely heat-sealing the first side sheet 7 and the bottom sheet 9 after cutting, wherein the heat-sealing temperature is 220 ℃ and the time is 0.5 s;
then, carrying out transverse heat sealing on the moisture-proof layer 12, the second side piece 10 (the breathable film 8) and the bottom piece 9 at the heat sealing temperature of 140 ℃ for 1 s; when in heat sealing, one side of the moisture-proof layer 12 coated with the heat-sealing glue covers the second side sheet 10 (the breathable film 8);
then, longitudinally heat-sealing the first side sheet 7, the second side sheet 10 (the breathable film 8), the moisture-proof layer 12 and the bottom sheet 9 to form two side heat sealing edges, so as to obtain a bag body with a containing cavity, wherein the heat sealing temperature is 150 ℃ and the time is 1 s; when the second side piece 10 (the breathable film 8) is longitudinally heat-sealed, one side, far away from the accommodating cavity, of the second side piece is covered with a moisture-proof layer 12; the bottom plate 9 is fixed between the first side plate 7 and the second side plate 10 to form the bottom of the dehumidification bag; the first side sheet 7, the second side sheet 10 and the bottom sheet 9 form a containing cavity for containing the dehumidifying agent.
Finally, cutting to obtain the dehumidifying bag; when cutting, the moisture-proof layer 12 in the dehumidifying bag is provided with a structure which is easy to tear the moisture-proof layer and extends out of the heat sealing position, and the structure can be square, rectangle, circular arc, ellipse and the like (the embodiment adopts circular arc).
After the moisture-proof agent is filled in the dehumidifying bag, the ends of the first side sheet 7 and the second side sheet 10 remote from the bottom sheet 9 may be heat-sealed.
The heat-sealing strength of the moisture-proof layer and the breathable film of the prepared dehumidifying bag is tested, and the heat-sealing strength is 12N/15 mm.
Example 3
A desiccant bag comprising:
the bag body comprises a first side sheet 7 and a second side sheet 10, wherein the first side sheet 7 is made of a first composite film, and the second side sheet 10 is made of a breathable film 8;
a housing chamber formed by heat-sealing the first side sheet 7 and the second side sheet 10;
the moisture-proof layer 12 covers one side of the second side piece 10 (the breathable film 8) far away from the accommodating cavity;
the lower end of the bag body is provided with a zipper 13 which can be opened and closed, and the length of the zipper is not less than the width of the upper opening of the bag body (the length of the zipper in the embodiment is consistent with the width of the upper opening of the bag body), as shown in fig. 9.
The breathable film is arranged on the bag body, and the outer surface of the breathable film is covered with the moisture-proof layer and is sealed in a heat-sealing mode, so that the breathable film is in close contact with the moisture-proof layer and does not absorb moisture, and the phenomenon that the effect of the dehumidifying agent is poor or fails due to the fact that the breathable film is in contact with the outside air in the transportation and storage processes is effectively prevented; through setting the dampproof course to tearable, when the buyer used, only need tear the dampproof course and just can use, convenient, swift. In addition, because the moisture is heavier than the air and moves downwards, the bottom of the wardrobe or the cupboard is a moisture gathering point, and the existing dehumidifying bag is hung on a clothes hanging rod in the wardrobe through a hook, namely above the wardrobe, so that the dehumidifying effect is poor; the utility model provides a dehumidification bag can be placed in the bottom of wardrobe or cupboard, need not the couple, and dehumidification is effectual.
The moisture-proof layer 12 comprises a barrier layer 1 (in this embodiment, a polyethylene terephthalate film layer is used) and a reinforcing layer 2 (in this embodiment, an aluminum foil layer is used);
the breathable film 8 is a breathable and waterproof non-woven fabric, so that even if the dehumidification bag is poured, water in the dehumidification bag cannot flow out due to the breathable film;
the first composite film comprises a heat sealing layer 3 (a polyethylene layer is adopted in the embodiment), an adhesive layer 4, an ink layer 5 and a printing layer 6 (a polyethylene terephthalate film layer is adopted in the embodiment) from inside to outside in sequence;
make the in close contact with of dampproof course not only with the ventilated membrane through adopting foretell material, easily tear moreover, convenient to use.
The thickness of the barrier layer 1 is 12-50 μm (12 μm is adopted in the embodiment); the sealing effect of the moisture-proof layer and the breathable film can be improved by limiting the thickness of the barrier layer.
The thickness of the adhesive layer is 1-3 μm (3 μm is adopted in the embodiment);
the thickness of the ink layer is less than 3 μm (1 μm is adopted in the embodiment);
the thickness of the heat sealing layer 3 is 30-150 μm (30 μm is adopted in the embodiment);
the thickness of the print layer 6 is 12-50 μm (50 μm is used in this embodiment).
By limiting the layer structure of the composite film and the thickness of each layer, the recycling frequency of the dehumidification bag can be improved, and energy is saved.
The end part of the bag body is provided with an openable zipper for sealing.
As an alternative embodiment, the reinforcing layer 2 may also be a polyester aluminized film layer, or a film layer formed by aluminum foil and polyethylene terephthalate.
As another alternative, the breathable film 8 can be tyvek.
As yet another alternative, the heat-seal layer 3 may be a cast polypropylene layer.
As yet another alternative, the print substrate 6 may be a polyamide layer or a polyethylene terephthalate film layer and a polyamide layer.
The preparation method of the dehumidifying bag comprises the following steps:
preparing a composite membrane:
firstly, printing character patterns (namely the ink layer 5) on the inner side of the printing layer 6 by adopting a gravure printing machine, wherein the printing speed is 200m/min, and the drying temperature is 60 ℃;
then coating polyurethane adhesive (namely the adhesive layer 4) on one side of the printing layer 6 printed with the characters and patterns, wherein the speed of coating the polyurethane adhesive is 200 m/min;
then compounding the side of the printing layer 6 coated with the polyurethane adhesive with the heat sealing layer 3 at the compounding speed of 200 m/min; during compounding, the temperature of the first-section drying tunnel is 60 ℃, the temperature of the second-section drying tunnel is 75 ℃, the temperature of the third-section drying tunnel is 80 ℃, and the laminating temperature is 60 ℃;
after the compounding is finished, curing at 40 ℃ in a curing chamber for 48 h; and obtaining the composite membrane.
Preparing a moisture-proof layer:
firstly, printing character patterns on the inner side of the barrier layer 1 by using a gravure printing machine, wherein the printing speed is 200m/min, and the drying temperature is 60 ℃;
then compounding the side of the blocking layer 1 printed with the character patterns with the reinforcing layer 2 at the compounding speed of 200 m/min; during compounding, the temperature of the first-section drying tunnel is 60 ℃, the temperature of the second-section drying tunnel is 75 ℃, the temperature of the third-section drying tunnel is 80 ℃, and the laminating temperature is 60 ℃;
after the compounding is finished, curing at 40 ℃ in a curing chamber for 48 h; and obtaining the moisture-proof layer.
Coating:
coating heat-sealing glue on one side of the enhancement layer 2 of the moisture-proof layer 12; wherein the speed of coating the heat-sealing glue is 180 m/min; when heat-seal glue is coated, the drying temperature of the first-section drying tunnel is 80 ℃, the drying temperature of the second-section drying tunnel is 100 ℃, and the drying temperature of the third-section drying tunnel is 120 ℃; the coating weight of the dried heat seal adhesive is 5g/m2。
Slitting:
and respectively cutting the composite film 11, the coated moisture-proof layer 12 and the breathable film 8 according to the specification to obtain the coiled material with the required width: a first side sheet 7, a second side sheet 10 (breathable film) and a moisture barrier 12.
And (3) heat sealing:
firstly, transversely heat-sealing the lower ends of the cut first side piece 7, the cut second side piece 10 and the moisture-proof layer 12 to form a foldable sealing structure (a foldable zipper 13 is adopted in the embodiment), and the length of the zipper is consistent with the width of an opening at the upper end of the bag body; the heat sealing temperature is 130 ℃, and the time is 1 s; when the heat seal is carried out transversely, the second side plate 10 (the breathable film) is positioned between the moisture-proof layer 12 and the first side plate 7, and one side of the moisture-proof layer 12 coated with the heat seal glue is contacted with the second side plate 10 (the breathable film);
then longitudinally heat-sealing the two side edges of the first side sheet 7, the second side sheet 10 and the moisture-proof layer 12 to form two side heat-sealed edges, so as to obtain a bag body with an accommodating cavity, wherein the heat-sealed temperature is 180 ℃ and the time is 0.8 s; a containing cavity for containing the desiccant is formed between the first side sheet 7 and the second side sheet 10;
after the moisture-proof agent is filled in the dehumidifying bag, heat sealing is performed on the other ends of the first side sheet 7, the second side sheet 10 and the moisture-proof layer 12.
The heat-sealing strength of the moisture-proof layer and the breathable film of the prepared dehumidifying bag is tested, and the heat-sealing strength is 10N/15 mm.
Comparative example 1
The difference from example 1 is only the heat-sealing temperature, which is: firstly, overlapping the cut breathable film 8 and a second composite film 11 to form a second side sheet 10, wherein the overlapped breathable film 8 is positioned at the inner side of the second composite film 11; then covering the breathable film 8 on one side of the moisture-proof layer 12 coated with the heat-sealing glue; the moisture-proof layer 12 at the lap joint part of the breathable film 8 and the second composite film 11 is positioned at the outer side of the second composite film 11, and then the lap joint part of the moisture-proof layer 12, the breathable film 8 and the second composite film 11 is subjected to transverse heat sealing, wherein the heat sealing temperature is 110 ℃, and the time is 0.5 s;
then, the bottom sheet 9 is transversely heat sealed with the first side sheet 7 and the second composite film 11 respectively; the heat sealing temperature is 150 ℃ and the time is 0.8 s;
finally, longitudinally heat-sealing the two side edges of the second side sheet 10, the first side sheet 7, the moisture-proof layer 12 and the bottom sheet 9 to form two side heat sealing edges, so as to obtain a bag body with an accommodating cavity, wherein the heat-sealing temperature is 110 ℃, and the time is 0.5 s; and the moisture-proof layer 12 is located on the side of the breathable film 8 remote from the first side sheet 7 when heat-sealed longitudinally. The bottom plate 9 is fixed between the first side plate 7 and the second side plate 10 to form the bottom of the dehumidification bag; a containing cavity for containing the dehumidifying agent is formed among the first side sheet 7, the second side sheet 10 and the bottom sheet 9.
The heat-sealing strength of the moisture-proof layer and the breathable film of the prepared dehumidifying bag is tested, and the heat-sealing strength is 3N/15 mm.
Comparative example 2
The difference from example 1 is only the heat-sealing temperature, which is: firstly, overlapping the cut breathable film 8 and a second composite film 11 to form a second side sheet 10, wherein the overlapped breathable film 8 is positioned at the inner side of the second composite film 11; then covering the breathable film 8 on one side of the moisture-proof layer 12 coated with the heat-sealing glue; the moisture-proof layer 12 at the lap joint part of the breathable film 8 and the second composite film 11 is positioned at the outer side of the second composite film 11, and then the lap joint part of the moisture-proof layer 12, the breathable film 8 and the second composite film 11 is subjected to transverse heat sealing, wherein the heat sealing temperature is 250 ℃ and the time is 0.5 s;
then, the bottom sheet 9 is transversely heat sealed with the first side sheet 7 and the second composite film 11 respectively; the heat sealing temperature is 150 ℃ and the time is 0.8 s;
finally, longitudinally heat-sealing the two side edges of the second side sheet 10, the first side sheet 7, the moisture-proof layer 12 and the bottom sheet 9 to form two side heat sealing edges, so as to obtain a bag body with an accommodating cavity, wherein the heat-sealing temperature is 250 ℃, and the time is 0.5 s; and the moisture-proof layer 12 is located on the side of the breathable film 8 remote from the first side sheet 7 when heat-sealed longitudinally. The bottom plate 9 is fixed between the first side plate 7 and the second side plate 10 to form the bottom of the dehumidification bag; a containing cavity for containing the dehumidifying agent is formed among the first side sheet 7, the second side sheet 10 and the bottom sheet 9.
The heat-sealing strength of the moisture-proof layer and the breathable film of the prepared dehumidifying bag is tested, and the heat-sealing strength is 30N/15 mm.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.
Claims (10)
1. A dehumidifying bag, comprising:
the bag body comprises a first side sheet and a second side sheet, wherein the side sheets comprise breathable films and/or composite films, and all or part of at least one side sheet is breathable film;
and the moisture-proof layer covers the outer side of the breathable film.
2. A dehumidifying bag as claimed in claim 1 wherein the bag body further comprises a bottom sheet.
3. The dehumidification bag of claim 1, wherein the bag body is provided with an openable and closable sealing structure.
4. Dehumidification bag according to any one of claims 1 to 3, wherein the moisture barrier comprises a reinforcement layer and a barrier layer.
5. The desiccant bag of claim 4 wherein the barrier layer is a polyethylene terephthalate film layer;
the enhancement layer is an aluminum foil layer, a polyester aluminum-plated film layer or a film layer formed by aluminum foil and polyethylene glycol terephthalate;
the breathable film is non-woven fabric or Tyvek.
6. Dehumidification bag according to claim 4, wherein the thickness of the barrier layer is 12-50 μm.
7. The dehumidifying bag as claimed in any one of claims 1 to 3, wherein the composite film comprises a heat-sealing layer, an adhesive layer, an ink layer and a printing layer in this order from inside to outside.
8. The desiccant bag of claim 7 wherein the heat seal layer is a polyethylene layer or a cast polypropylene layer;
the printing layer is a polyethylene terephthalate film layer and/or a polyamide layer.
9. The desiccant bag of claim 7 wherein the adhesive layer has a thickness of 1-3 μm;
the thickness of the ink layer is less than 3 μm;
the thickness of the heat sealing layer is 30-150 μm;
the thickness of the printing layer is 12-50 μm.
10. A dehumidifying bag as claimed in any one of claims 1 to 3 wherein the moisture barrier is provided with an easy-open structure.
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| CN202020998013.3U CN212244469U (en) | 2020-06-03 | 2020-06-03 | Dehumidification bag |
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| CN202020998013.3U CN212244469U (en) | 2020-06-03 | 2020-06-03 | Dehumidification bag |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021243883A1 (en) * | 2020-06-03 | 2021-12-09 | 浙江金石包装有限公司 | Dehumidification bag and preparation method therefor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021243883A1 (en) * | 2020-06-03 | 2021-12-09 | 浙江金石包装有限公司 | Dehumidification bag and preparation method therefor |
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